--- /dev/null
+"""
+Functions to perform remctls.
+"""
+
+from sipb_xen_database import Machine, Disk, Type, NIC, CDROM, ctx, meta
+import validation
+from webcommon import CodeError, InvalidInput
+import random
+import subprocess
+import sys
+import time
+import re
+
+# ... and stolen from xend/uuid.py
+def randomUUID():
+ """Generate a random UUID."""
+
+ return [ random.randint(0, 255) for _ in range(0, 16) ]
+
+def uuidToString(u):
+ """Turn a numeric UUID to a hyphen-seperated one."""
+ return "-".join(["%02x" * 4, "%02x" * 2, "%02x" * 2, "%02x" * 2,
+ "%02x" * 6]) % tuple(u)
+# end stolen code
+
+def kinit(username = 'tabbott/extra', keytab = '/etc/tabbott.keytab'):
+ """Kinit with a given username and keytab"""
+
+ p = subprocess.Popen(['kinit', "-k", "-t", keytab, username],
+ stderr=subprocess.PIPE)
+ e = p.wait()
+ if e:
+ raise CodeError("Error %s in kinit: %s" % (e, p.stderr.read()))
+
+def checkKinit():
+ """If we lack tickets, kinit."""
+ p = subprocess.Popen(['klist', '-s'])
+ if p.wait():
+ kinit()
+
+def remctl(*args, **kws):
+ """Perform a remctl and return the output.
+
+ kinits if necessary, and outputs errors to stderr.
+ """
+ checkKinit()
+ p = subprocess.Popen(['remctl', 'black-mesa.mit.edu']
+ + list(args),
+ stdout=subprocess.PIPE,
+ stderr=subprocess.PIPE)
+ v = p.wait()
+ if kws.get('err'):
+ return p.stdout.read(), p.stderr.read()
+ if v:
+ print >> sys.stderr, 'Error', v, 'on remctl', args, ':'
+ print >> sys.stderr, p.stderr.read()
+ raise CodeError('ERROR on remctl')
+ return p.stdout.read()
+
+def lvcreate(machine, disk):
+ """Create a single disk for a machine"""
+ remctl('web', 'lvcreate', machine.name,
+ disk.guest_device_name, str(disk.size))
+
+def makeDisks(machine):
+ """Update the lvm partitions to add a disk."""
+ for disk in machine.disks:
+ lvcreate(machine, disk)
+
+def bootMachine(machine, cdtype):
+ """Boot a machine with a given boot CD.
+
+ If cdtype is None, give no boot cd. Otherwise, it is the string
+ id of the CD (e.g. 'gutsy_i386')
+ """
+ if cdtype is not None:
+ remctl('control', machine.name, 'create',
+ cdtype)
+ else:
+ remctl('control', machine.name, 'create')
+
+def registerMachine(machine):
+ """Register a machine to be controlled by the web interface"""
+ remctl('web', 'register', machine.name)
+
+def unregisterMachine(machine):
+ """Unregister a machine to not be controlled by the web interface"""
+ remctl('web', 'unregister', machine.name)
+
+def createVm(user, name, memory, disk, is_hvm, cdrom):
+ """Create a VM and put it in the database"""
+ # put stuff in the table
+ transaction = ctx.current.create_transaction()
+ try:
+ validation.validMemory(user, memory)
+ validation.validDisk(user, disk * 1. / 1024)
+ validation.validAddVm(user)
+ res = meta.engine.execute('select nextval('
+ '\'"machines_machine_id_seq"\')')
+ id = res.fetchone()[0]
+ machine = Machine()
+ machine.machine_id = id
+ machine.name = name
+ machine.memory = memory
+ machine.owner = user.username
+ machine.administrator = user.username
+ machine.contact = user.email
+ machine.uuid = uuidToString(randomUUID())
+ machine.boot_off_cd = True
+ machine_type = Type.get_by(hvm=is_hvm)
+ machine.type_id = machine_type.type_id
+ ctx.current.save(machine)
+ disk = Disk(machine.machine_id,
+ 'hda', disk)
+ open_nics = NIC.select_by(machine_id=None)
+ if not open_nics: #No IPs left!
+ raise CodeError("No IP addresses left! "
+ "Contact sipb-xen-dev@mit.edu")
+ nic = open_nics[0]
+ nic.machine_id = machine.machine_id
+ nic.hostname = name
+ ctx.current.save(nic)
+ ctx.current.save(disk)
+ transaction.commit()
+ except:
+ transaction.rollback()
+ raise
+ registerMachine(machine)
+ makeDisks(machine)
+ # tell it to boot with cdrom
+ bootMachine(machine, cdrom)
+ return machine
+
+def getUptimes(machines=None):
+ """Return a dictionary mapping machine names to uptime strings"""
+ value_string = remctl('web', 'listvms')
+ lines = value_string.splitlines()
+ d = {}
+ for line in lines:
+ lst = line.split()
+ name, id = lst[:2]
+ uptime = ' '.join(lst[2:])
+ d[name] = uptime
+ ans = {}
+ for m in machines:
+ ans[m] = d.get(m.name)
+ return ans
+
+def parseStatus(s):
+ """Parse a status string into nested tuples of strings.
+
+ s = output of xm list --long <machine_name>
+ """
+ values = re.split('([()])', s)
+ stack = [[]]
+ for v in values[2:-2]: #remove initial and final '()'
+ if not v:
+ continue
+ v = v.strip()
+ if v == '(':
+ stack.append([])
+ elif v == ')':
+ if len(stack[-1]) == 1:
+ stack[-1].append('')
+ stack[-2].append(stack[-1])
+ stack.pop()
+ else:
+ if not v:
+ continue
+ stack[-1].extend(v.split())
+ return stack[-1]
+
+def statusInfo(machine):
+ """Return the status list for a given machine.
+
+ Gets and parses xm list --long
+ """
+ value_string, err_string = remctl('control', machine.name, 'list-long',
+ err=True)
+ if 'Unknown command' in err_string:
+ raise CodeError("ERROR in remctl list-long %s is not registered" %
+ (machine.name,))
+ elif 'does not exist' in err_string:
+ return None
+ elif err_string:
+ raise CodeError("ERROR in remctl list-long %s: %s" %
+ (machine.name, err_string))
+ status = parseStatus(value_string)
+ return status
+
+def deleteVM(machine):
+ """Delete a VM."""
+ remctl('control', machine.name, 'destroy', err=True)
+ transaction = ctx.current.create_transaction()
+ delete_disk_pairs = [(machine.name, d.guest_device_name)
+ for d in machine.disks]
+ try:
+ for nic in machine.nics:
+ nic.machine_id = None
+ nic.hostname = None
+ ctx.current.save(nic)
+ for disk in machine.disks:
+ ctx.current.delete(disk)
+ ctx.current.delete(machine)
+ transaction.commit()
+ except:
+ transaction.rollback()
+ raise
+ for mname, dname in delete_disk_pairs:
+ remctl('web', 'lvremove', mname, dname)
+ unregisterMachine(machine)
+
+def commandResult(user, fields):
+ start_time = 0
+ print >> sys.stderr, time.time()-start_time
+ machine = validation.testMachineId(user, fields.getfirst('machine_id'))
+ action = fields.getfirst('action')
+ cdrom = fields.getfirst('cdrom')
+ print >> sys.stderr, time.time()-start_time
+ if cdrom is not None and not CDROM.get(cdrom):
+ raise CodeError("Invalid cdrom type '%s'" % cdrom)
+ if action not in ('Reboot', 'Power on', 'Power off', 'Shutdown',
+ 'Delete VM'):
+ raise CodeError("Invalid action '%s'" % action)
+ if action == 'Reboot':
+ if cdrom is not None:
+ out, err = remctl('control', machine.name, 'reboot', cdrom,
+ err=True)
+ else:
+ out, err = remctl('control', machine.name, 'reboot',
+ err=True)
+ if err:
+ if re.match("Error: Domain '.*' does not exist.", err):
+ raise InvalidInput("action", "reboot",
+ "Machine is not on")
+ else:
+ print >> sys.stderr, 'Error on reboot:'
+ print >> sys.stderr, err
+ raise CodeError('ERROR on remctl')
+
+ elif action == 'Power on':
+ if validation.maxMemory(user, machine) < machine.memory:
+ raise InvalidInput('action', 'Power on',
+ "You don't have enough free RAM quota "
+ "to turn on this machine.")
+ bootMachine(machine, cdrom)
+ elif action == 'Power off':
+ out, err = remctl('control', machine.name, 'destroy', err=True)
+ if err:
+ if re.match("Error: Domain '.*' does not exist.", err):
+ raise InvalidInput("action", "Power off",
+ "Machine is not on.")
+ else:
+ print >> sys.stderr, 'Error on power off:'
+ print >> sys.stderr, err
+ raise CodeError('ERROR on remctl')
+ elif action == 'Shutdown':
+ out, err = remctl('control', machine.name, 'shutdown', err=True)
+ if err:
+ if re.match("Error: Domain '.*' does not exist.", err):
+ raise InvalidInput("action", "Shutdown",
+ "Machine is not on.")
+ else:
+ print >> sys.stderr, 'Error on Shutdown:'
+ print >> sys.stderr, err
+ raise CodeError('ERROR on remctl')
+ elif action == 'Delete VM':
+ deleteVM(machine)
+ print >> sys.stderr, time.time()-start_time
+
+ d = dict(user=user,
+ command=action,
+ machine=machine)
+ return d
+
+def resizeDisk(machine_name, disk_name, new_size):
+ remctl("web", "lvresize", machine_name, disk_name, new_size)
+
+def renameMachine(machine, old_name, new_name):
+ for disk in machine.disks:
+ remctl("web", "lvrename", old_name,
+ disk.guest_device_name, new_name)
+ remctl("web", "moveregister", old_name, new_name)
+
import cPickle
import cgi
import datetime
-import getafsgroups
import hmac
import os
-import random
-import re
import sha
import simplejson
-import string
-import subprocess
import sys
import time
from StringIO import StringIO
sys.path.append('/home/ecprice/.local/lib/python2.5/site-packages')
from Cheetah.Template import Template
-from sipb_xen_database import *
-
-class MyException(Exception):
- """Base class for my exceptions"""
- pass
-
-class InvalidInput(MyException):
- """Exception for user-provided input is invalid but maybe in good faith.
-
- This would include setting memory to negative (which might be a
- typo) but not setting an invalid boot CD (which requires bypassing
- the select box).
- """
- def __init__(self, err_field, err_value, expl=None):
- MyException.__init__(self, expl)
- self.err_field = err_field
- self.err_value = err_value
-
-class CodeError(MyException):
- """Exception for internal errors or bad faith input."""
- pass
+from sipb_xen_database import Machine, CDROM, ctx, connect
+import validation
+from webcommon import InvalidInput, CodeError, g
+import controls
def helppopup(subj):
"""Return HTML code for a (?) link to a specified help topic"""
'&simple=true" target="_blank" ' +
'onclick="return helppopup(\'' + subj + '\')">(?)</a></span>')
-class Global(object):
- """Global state of the system, to avoid duplicate remctls to get state"""
- def __init__(self, user):
- self.user = user
-
- def __get_uptimes(self):
- if not hasattr(self, '_uptimes'):
- self._uptimes = getUptimes(Machine.select())
- return self._uptimes
- uptimes = property(__get_uptimes)
-
- def clear(self):
- """Clear the state so future accesses reload it."""
- for attr in ('_uptimes', ):
- if hasattr(self, attr):
- delattr(self, attr)
-
-g = None
-
class User:
"""User class (sort of useless, I admit)"""
def __init__(self, username, email):
-default_headers = {'Content-Type': 'text/html'}
-
-# ... and stolen from xend/uuid.py
-def randomUUID():
- """Generate a random UUID."""
-
- return [ random.randint(0, 255) for _ in range(0, 16) ]
-
-def uuidToString(u):
- """Turn a numeric UUID to a hyphen-seperated one."""
- return "-".join(["%02x" * 4, "%02x" * 2, "%02x" * 2, "%02x" * 2,
- "%02x" * 6]) % tuple(u)
-
-MAX_MEMORY_TOTAL = 512
-MAX_MEMORY_SINGLE = 256
-MIN_MEMORY_SINGLE = 16
-MAX_DISK_TOTAL = 50
-MAX_DISK_SINGLE = 50
-MIN_DISK_SINGLE = 0.1
-MAX_VMS_TOTAL = 10
-MAX_VMS_ACTIVE = 4
-
-def getMachinesByOwner(user, machine=None):
- """Return the machines owned by the same as a machine.
-
- If the machine is None, return the machines owned by the same
- user.
- """
- if machine:
- owner = machine.owner
- else:
- owner = user.username
- return Machine.select_by(owner=owner)
-
-def maxMemory(user, machine=None, on=True):
- """Return the maximum memory for a machine or a user.
-
- If machine is None, return the memory available for a new
- machine. Else, return the maximum that machine can have.
-
- on is whether the machine should be turned on. If false, the max
- memory for the machine to change to, if it is left off, is
- returned.
- """
- if not on:
- return MAX_MEMORY_SINGLE
- machines = getMachinesByOwner(user, machine)
- active_machines = [x for x in machines if g.uptimes[x]]
- mem_usage = sum([x.memory for x in active_machines if x != machine])
- return min(MAX_MEMORY_SINGLE, MAX_MEMORY_TOTAL-mem_usage)
-
-def maxDisk(user, machine=None):
- machines = getMachinesByOwner(user, machine)
- disk_usage = sum([sum([y.size for y in x.disks])
- for x in machines if x != machine])
- return min(MAX_DISK_SINGLE, MAX_DISK_TOTAL-disk_usage/1024.)
-
-def cantAddVm(user):
- machines = getMachinesByOwner(user)
- active_machines = [x for x in machines if g.uptimes[x]]
- if len(machines) >= MAX_VMS_TOTAL:
- return 'You have too many VMs to create a new one.'
- if len(active_machines) >= MAX_VMS_ACTIVE:
- return ('You already have the maximum number of VMs turned on. '
- 'To create more, turn one off.')
- return False
-
-def haveAccess(user, machine):
- """Return whether a user has adminstrative access to a machine"""
- if user.username == 'moo':
- return True
- if user.username in (machine.administrator, machine.owner):
- return True
- if getafsgroups.checkAfsGroup(user.username, machine.administrator,
- 'athena.mit.edu'): #XXX Cell?
- return True
- if getafsgroups.checkLockerOwner(user.username, machine.owner):
- return True
- return owns(user, machine)
-
-def owns(user, machine):
- """Return whether a user owns a machine"""
- if user.username == 'moo':
- return True
- return getafsgroups.checkLockerOwner(user.username, machine.owner)
+DEFAULT_HEADERS = {'Content-Type': 'text/html'}
def error(op, user, fields, err, emsg):
"""Print an error page when a CodeError occurs"""
d = dict(op=op, user=user, errorMessage=str(err),
stderr=emsg)
- return Template(file='error.tmpl', searchList=[d]);
+ return Template(file='error.tmpl', searchList=[d])
def invalidInput(op, user, fields, err, emsg):
"""Print an error page when an InvalidInput exception occurs"""
d = dict(op=op, user=user, err_field=err.err_field,
err_value=str(err.err_value), stderr=emsg,
errorMessage=str(err))
- return Template(file='invalid.tmpl', searchList=[d]);
-
-def validMachineName(name):
- """Check that name is valid for a machine name"""
- if not name:
- return False
- charset = string.ascii_letters + string.digits + '-_'
- if name[0] in '-_' or len(name) > 22:
- return False
- for x in name:
- if x not in charset:
- return False
- return True
-
-def kinit(username = 'tabbott/extra', keytab = '/etc/tabbott.keytab'):
- """Kinit with a given username and keytab"""
-
- p = subprocess.Popen(['kinit', "-k", "-t", keytab, username],
- stderr=subprocess.PIPE)
- e = p.wait()
- if e:
- raise CodeError("Error %s in kinit: %s" % (e, p.stderr.read()))
-
-def checkKinit():
- """If we lack tickets, kinit."""
- p = subprocess.Popen(['klist', '-s'])
- if p.wait():
- kinit()
-
-def remctl(*args, **kws):
- """Perform a remctl and return the output.
-
- kinits if necessary, and outputs errors to stderr.
- """
- checkKinit()
- p = subprocess.Popen(['remctl', 'black-mesa.mit.edu']
- + list(args),
- stdout=subprocess.PIPE,
- stderr=subprocess.PIPE)
- v = p.wait()
- if kws.get('err'):
- return p.stdout.read(), p.stderr.read()
- if v:
- print >> sys.stderr, 'Error', v, 'on remctl', args, ':'
- print >> sys.stderr, p.stderr.read()
- raise CodeError('ERROR on remctl')
- return p.stdout.read()
-
-def lvcreate(machine, disk):
- """Create a single disk for a machine"""
- remctl('web', 'lvcreate', machine.name,
- disk.guest_device_name, str(disk.size))
-
-def makeDisks(machine):
- """Update the lvm partitions to add a disk."""
- for disk in machine.disks:
- lvcreate(machine, disk)
-
-def bootMachine(machine, cdtype):
- """Boot a machine with a given boot CD.
-
- If cdtype is None, give no boot cd. Otherwise, it is the string
- id of the CD (e.g. 'gutsy_i386')
- """
- if cdtype is not None:
- remctl('control', machine.name, 'create',
- cdtype)
- else:
- remctl('control', machine.name, 'create')
-
-def registerMachine(machine):
- """Register a machine to be controlled by the web interface"""
- remctl('web', 'register', machine.name)
-
-def unregisterMachine(machine):
- """Unregister a machine to not be controlled by the web interface"""
- remctl('web', 'unregister', machine.name)
-
-def parseStatus(s):
- """Parse a status string into nested tuples of strings.
-
- s = output of xm list --long <machine_name>
- """
- values = re.split('([()])', s)
- stack = [[]]
- for v in values[2:-2]: #remove initial and final '()'
- if not v:
- continue
- v = v.strip()
- if v == '(':
- stack.append([])
- elif v == ')':
- if len(stack[-1]) == 1:
- stack[-1].append('')
- stack[-2].append(stack[-1])
- stack.pop()
- else:
- if not v:
- continue
- stack[-1].extend(v.split())
- return stack[-1]
-
-def getUptimes(machines=None):
- """Return a dictionary mapping machine names to uptime strings"""
- value_string = remctl('web', 'listvms')
- lines = value_string.splitlines()
- d = {}
- for line in lines:
- lst = line.split()
- name, id = lst[:2]
- uptime = ' '.join(lst[2:])
- d[name] = uptime
- ans = {}
- for m in machines:
- ans[m] = d.get(m.name)
- return ans
-
-def statusInfo(machine):
- """Return the status list for a given machine.
-
- Gets and parses xm list --long
- """
- value_string, err_string = remctl('control', machine.name, 'list-long',
- err=True)
- if 'Unknown command' in err_string:
- raise CodeError("ERROR in remctl list-long %s is not registered" %
- (machine.name,))
- elif 'does not exist' in err_string:
- return None
- elif err_string:
- raise CodeError("ERROR in remctl list-long %s: %s" %
- (machine.name, err_string))
- status = parseStatus(value_string)
- return status
+ return Template(file='invalid.tmpl', searchList=[d])
def hasVnc(status):
"""Does the machine with a given status list support VNC?"""
return 'location' in d
return False
-def createVm(user, name, memory, disk, is_hvm, cdrom):
- """Create a VM and put it in the database"""
- # put stuff in the table
- transaction = ctx.current.create_transaction()
- try:
- if memory > maxMemory(user):
- raise InvalidInput('memory', memory,
- "Max %s" % maxMemory(user))
- if disk > maxDisk(user) * 1024:
- raise InvalidInput('disk', disk,
- "Max %s" % maxDisk(user))
- reason = cantAddVm(user)
- if reason:
- raise InvalidInput('create', True, reason)
- res = meta.engine.execute('select nextval('
- '\'"machines_machine_id_seq"\')')
- id = res.fetchone()[0]
- machine = Machine()
- machine.machine_id = id
- machine.name = name
- machine.memory = memory
- machine.owner = user.username
- machine.administrator = user.username
- machine.contact = user.email
- machine.uuid = uuidToString(randomUUID())
- machine.boot_off_cd = True
- machine_type = Type.get_by(hvm=is_hvm)
- machine.type_id = machine_type.type_id
- ctx.current.save(machine)
- disk = Disk(machine.machine_id,
- 'hda', disk)
- open_nics = NIC.select_by(machine_id=None)
- if not open_nics: #No IPs left!
- raise CodeError("No IP addresses left! "
- "Contact sipb-xen-dev@mit.edu")
- nic = open_nics[0]
- nic.machine_id = machine.machine_id
- nic.hostname = name
- ctx.current.save(nic)
- ctx.current.save(disk)
- transaction.commit()
- except:
- transaction.rollback()
- raise
- registerMachine(machine)
- makeDisks(machine)
- # tell it to boot with cdrom
- bootMachine(machine, cdrom)
-
- return machine
-
-def validMemory(user, memory, machine=None, on=True):
- """Parse and validate limits for memory for a given user and machine.
-
- on is whether the memory must be valid after the machine is
- switched on.
- """
- try:
- memory = int(memory)
- if memory < MIN_MEMORY_SINGLE:
- raise ValueError
- except ValueError:
- raise InvalidInput('memory', memory,
- "Minimum %s MB" % MIN_MEMORY_SINGLE)
- if memory > maxMemory(user, machine, on):
- raise InvalidInput('memory', memory,
- 'Maximum %s MB' % maxMemory(user, machine))
- return memory
-
-def validDisk(user, disk, machine=None):
- """Parse and validate limits for disk for a given user and machine."""
- try:
- disk = float(disk)
- if disk > maxDisk(user, machine):
- raise InvalidInput('disk', disk,
- "Maximum %s G" % maxDisk(user, machine))
- disk = int(disk * 1024)
- if disk < MIN_DISK_SINGLE * 1024:
- raise ValueError
- except ValueError:
- raise InvalidInput('disk', disk,
- "Minimum %s GB" % MIN_DISK_SINGLE)
- return disk
-
def parseCreate(user, fields):
name = fields.getfirst('name')
- if not validMachineName(name):
+ if not validation.validMachineName(name):
raise InvalidInput('name', name, 'You must provide a machine name.')
name = name.lower()
"Name already exists.")
memory = fields.getfirst('memory')
- memory = validMemory(user, memory, on=True)
+ memory = validation.validMemory(user, memory, on=True)
disk = fields.getfirst('disk')
- disk = validDisk(user, disk)
+ disk = validation.validDisk(user, disk)
vm_type = fields.getfirst('vmtype')
if vm_type not in ('hvm', 'paravm'):
"""Handler for create requests."""
try:
parsed_fields = parseCreate(user, fields)
- machine = createVm(**parsed_fields)
+ machine = controls.createVm(**parsed_fields)
except InvalidInput, err:
pass
else:
def getListDict(user):
- machines = [m for m in Machine.select() if haveAccess(user, m)]
+ machines = [m for m in Machine.select()
+ if validation.haveAccess(user, m)]
on = {}
has_vnc = {}
on = g.uptimes
has_vnc[m] = True
else:
has_vnc[m] = "ParaVM"+helppopup("paravm_console")
- # for m in machines:
- # status = statusInfo(m)
- # on[m.name] = status is not None
- # has_vnc[m.name] = hasVnc(status)
- max_memory = maxMemory(user)
- max_disk = maxDisk(user)
+ max_memory = validation.maxMemory(user)
+ max_disk = validation.maxDisk(user)
defaults = Defaults(max_memory=max_memory,
max_disk=max_disk,
cdrom='gutsy-i386')
d = dict(user=user,
- cant_add_vm=cantAddVm(user),
+ cant_add_vm=validation.cantAddVm(user),
max_memory=max_memory,
max_disk=max_disk,
defaults=defaults,
d = getListDict(user)
return Template(file='list.tmpl', searchList=[d])
-def testMachineId(user, machineId, exists=True):
- """Parse, validate and check authorization for a given machineId.
-
- If exists is False, don't check that it exists.
- """
- if machineId is None:
- raise CodeError("No machine ID specified")
- try:
- machineId = int(machineId)
- except ValueError:
- raise CodeError("Invalid machine ID '%s'" % machineId)
- machine = Machine.get(machineId)
- if exists and machine is None:
- raise CodeError("No such machine ID '%s'" % machineId)
- if machine is not None and not haveAccess(user, machine):
- raise CodeError("No access to machine ID '%s'" % machineId)
- return machine
-
def vnc(user, fields):
"""VNC applet page.
Remember to enable iptables!
echo 1 > /proc/sys/net/ipv4/ip_forward
"""
- machine = testMachineId(user, fields.getfirst('machine_id'))
+ machine = validation.testMachineId(user, fields.getfirst('machine_id'))
TOKEN_KEY = "0M6W0U1IXexThi5idy8mnkqPKEq1LtEnlK/pZSn0cDrN"
token = cPickle.dumps(token)
token = base64.urlsafe_b64encode(token)
- status = statusInfo(machine)
+ status = controls.statusInfo(machine)
has_vnc = hasVnc(status)
d = dict(user=user,
data_dict['%s_size' % name] = "%0.1f GB" % (disk.size / 1024.)
return disk_fields
-def deleteVM(machine):
- """Delete a VM."""
- remctl('control', machine.name, 'destroy', err=True)
- transaction = ctx.current.create_transaction()
- delete_disk_pairs = [(machine.name, d.guest_device_name)
- for d in machine.disks]
- try:
- for nic in machine.nics:
- nic.machine_id = None
- nic.hostname = None
- ctx.current.save(nic)
- for disk in machine.disks:
- ctx.current.delete(disk)
- ctx.current.delete(machine)
- transaction.commit()
- except:
- transaction.rollback()
- raise
- for mname, dname in delete_disk_pairs:
- remctl('web', 'lvremove', mname, dname)
- unregisterMachine(machine)
-
-def commandResult(user, fields):
- print >> sys.stderr, time.time()-start_time
- machine = testMachineId(user, fields.getfirst('machine_id'))
- action = fields.getfirst('action')
- cdrom = fields.getfirst('cdrom')
- print >> sys.stderr, time.time()-start_time
- if cdrom is not None and not CDROM.get(cdrom):
- raise CodeError("Invalid cdrom type '%s'" % cdrom)
- if action not in ('Reboot', 'Power on', 'Power off', 'Shutdown',
- 'Delete VM'):
- raise CodeError("Invalid action '%s'" % action)
- if action == 'Reboot':
- if cdrom is not None:
- out, err = remctl('control', machine.name, 'reboot', cdrom,
- err=True)
- else:
- out, err = remctl('control', machine.name, 'reboot',
- err=True)
- if err:
- if re.match("Error: Domain '.*' does not exist.", err):
- raise InvalidInput("action", "reboot",
- "Machine is not on")
- else:
- print >> sys.stderr, 'Error on reboot:'
- print >> sys.stderr, err
- raise CodeError('ERROR on remctl')
-
- elif action == 'Power on':
- if maxMemory(user) < machine.memory:
- raise InvalidInput('action', 'Power on',
- "You don't have enough free RAM quota "
- "to turn on this machine.")
- bootMachine(machine, cdrom)
- elif action == 'Power off':
- out, err = remctl('control', machine.name, 'destroy', err=True)
- if err:
- if re.match("Error: Domain '.*' does not exist.", err):
- raise InvalidInput("action", "Power off",
- "Machine is not on.")
- else:
- print >> sys.stderr, 'Error on power off:'
- print >> sys.stderr, err
- raise CodeError('ERROR on remctl')
- elif action == 'Shutdown':
- out, err = remctl('control', machine.name, 'shutdown', err=True)
- if err:
- if re.match("Error: Domain '.*' does not exist.", err):
- raise InvalidInput("action", "Shutdown",
- "Machine is not on.")
- else:
- print >> sys.stderr, 'Error on Shutdown:'
- print >> sys.stderr, err
- raise CodeError('ERROR on remctl')
- elif action == 'Delete VM':
- deleteVM(machine)
- print >> sys.stderr, time.time()-start_time
-
- d = dict(user=user,
- command=action,
- machine=machine)
- return d
-
def command(user, fields):
"""Handler for running commands like boot and delete on a VM."""
back = fields.getfirst('back')
try:
- d = commandResult(user, fields)
+ d = controls.commandResult(user, fields)
if d['command'] == 'Delete VM':
back = 'list'
except InvalidInput, err:
d['result'] = result
return Template(file='list.tmpl', searchList=[d])
elif back == 'info':
- machine = testMachineId(user, fields.getfirst('machine_id'))
+ machine = validation.testMachineId(user, fields.getfirst('machine_id'))
d = infoDict(user, machine)
d['result'] = result
return Template(file='info.tmpl', searchList=[d])
else:
raise InvalidInput('back', back, 'Not a known back page.')
-def testAdmin(user, admin, machine):
- if admin in (None, machine.administrator):
- return None
- if admin == user.username:
- return admin
- if getafsgroups.checkAfsGroup(user.username, admin, 'athena.mit.edu'):
- return admin
- if getafsgroups.checkAfsGroup(user.username, 'system:'+admin,
- 'athena.mit.edu'):
- return 'system:'+admin
- return admin
- #raise InvalidInput('administrator', admin,
- # 'You must control the group you move it to.')
-
-def testOwner(user, owner, machine):
- if owner in (None, machine.owner):
- return None
- value = getafsgroups.checkLockerOwner(user.username, owner, verbose=True)
- if value == True:
- return owner
- raise InvalidInput('owner', owner, value)
-
-def testContact(user, contact, machine=None):
- if contact in (None, machine.contact):
- return None
- if not re.match("^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$", contact, re.I):
- raise InvalidInput('contact', contact, "Not a valid email.")
- return contact
-
-def testDisk(user, disksize, machine=None):
- return disksize
-
-def testName(user, name, machine=None):
- if name in (None, machine.name):
- return None
- if not Machine.select_by(name=name):
- return name
- raise InvalidInput('name', name, "Name is already taken.")
-
-def testHostname(user, hostname, machine):
- for nic in machine.nics:
- if hostname == nic.hostname:
- return hostname
- # check if doesn't already exist
- if NIC.select_by(hostname=hostname):
- raise InvalidInput('hostname', hostname,
- "Already exists")
- if not re.match("^[A-Z0-9-]{1,22}$", hostname, re.I):
- raise InvalidInput('hostname', hostname, "Not a valid hostname; "
- "must only use number, letters, and dashes.")
- return hostname
-
def modifyDict(user, fields):
olddisk = {}
transaction = ctx.current.create_transaction()
try:
- machine = testMachineId(user, fields.getfirst('machine_id'))
- owner = testOwner(user, fields.getfirst('owner'), machine)
- admin = testAdmin(user, fields.getfirst('administrator'), machine)
- contact = testContact(user, fields.getfirst('contact'), machine)
- hostname = testHostname(owner, fields.getfirst('hostname'), machine)
- name = testName(user, fields.getfirst('name'), machine)
+ machine = validation.testMachineId(user, fields.getfirst('machine_id'))
+ owner = validation.testOwner(user, fields.getfirst('owner'), machine)
+ admin = validation.testAdmin(user, fields.getfirst('administrator'),
+ machine)
+ contact = validation.testContact(user, fields.getfirst('contact'),
+ machine)
+ hostname = validation.testHostname(owner, fields.getfirst('hostname'),
+ machine)
+ name = validation.testName(user, fields.getfirst('name'), machine)
oldname = machine.name
command = "modify"
memory = fields.getfirst('memory')
if memory is not None:
- memory = validMemory(user, memory, machine, on=False)
+ memory = validation.validMemory(user, memory, machine, on=False)
machine.memory = memory
- disksize = testDisk(user, fields.getfirst('disk'))
+ disksize = validation.testDisk(user, fields.getfirst('disk'))
if disksize is not None:
- disksize = validDisk(user, disksize, machine)
+ disksize = validation.validDisk(user, disksize, machine)
disk = machine.disks[0]
if disk.size != disksize:
olddisk[disk.guest_device_name] = disksize
transaction.rollback()
raise
for diskname in olddisk:
- remctl("web", "lvresize", oldname, diskname, str(olddisk[diskname]))
+ controls.resizeDisk(oldname, diskname, str(olddisk[diskname]))
if name is not None:
- for disk in machine.disks:
- remctl("web", "lvrename", oldname, disk.guest_device_name, name)
- remctl("web", "moveregister", oldname, name)
+ controls.renameMachine(machine, oldname, name)
return dict(user=user,
command=command,
machine=machine)
modify_dict = modifyDict(user, fields)
except InvalidInput, err:
result = None
- machine = testMachineId(user, fields.getfirst('machine_id'))
+ machine = validation.testMachineId(user, fields.getfirst('machine_id'))
else:
machine = modify_dict['machine']
- result='Success!'
+ result = 'Success!'
err = None
info_dict = infoDict(user, machine)
info_dict['err'] = err
raise CodeError("Unknown operation")
def infoDict(user, machine):
- status = statusInfo(machine)
+ status = controls.statusInfo(machine)
has_vnc = hasVnc(status)
if status is None:
main_status = dict(name=machine.name,
else:
pass
#fields.append((disp, None))
- max_mem = maxMemory(user, machine)
- max_disk = maxDisk(user, machine)
- defaults=Defaults()
+ max_mem = validation.maxMemory(user, machine)
+ max_disk = validation.maxDisk(user, machine)
+ defaults = Defaults()
for name in 'machine_id name administrator owner memory contact'.split():
setattr(defaults, name, getattr(machine, name))
if machine.nics:
def info(user, fields):
"""Handler for info on a single VM."""
- machine = testMachineId(user, fields.getfirst('machine_id'))
+ machine = validation.testMachineId(user, fields.getfirst('machine_id'))
d = infoDict(user, machine)
return Template(file='info.tmpl', searchList=[d])
else:
return User('moo', 'nobody')
-if __name__ == '__main__':
- start_time = time.time()
- fields = cgi.FieldStorage()
- u = getUser()
- g = Global(u)
- operation = os.environ.get('PATH_INFO', '')
- if not operation:
- print "Status: 301 Moved Permanently"
- print 'Location: ' + os.environ['SCRIPT_NAME']+'/\n'
- sys.exit(0)
-
- if operation.startswith('/'):
- operation = operation[1:]
- if not operation:
- operation = 'list'
-
-
-
+def main(operation, user, fields):
fun = mapping.get(operation, badOperation)
if fun not in (helpHandler, ):
try:
output = fun(u, fields)
- headers = dict(default_headers)
+ headers = dict(DEFAULT_HEADERS)
if isinstance(output, tuple):
new_headers, output = output
headers.update(new_headers)
print e
print '----'
raise
+
+if __name__ == '__main__':
+ start_time = time.time()
+ fields = cgi.FieldStorage()
+ u = getUser()
+ g.user = u
+ operation = os.environ.get('PATH_INFO', '')
+ if not operation:
+ print "Status: 301 Moved Permanently"
+ print 'Location: ' + os.environ['SCRIPT_NAME']+'/\n'
+ sys.exit(0)
+
+ if operation.startswith('/'):
+ operation = operation[1:]
+ if not operation:
+ operation = 'list'
+
+ main(operation, u, fields)
+
--- /dev/null
+#!/usr/bin/python
+
+import getafsgroups
+import re
+import string
+from sipb_xen_database import Machine, NIC
+from webcommon import InvalidInput, g
+
+MAX_MEMORY_TOTAL = 512
+MAX_MEMORY_SINGLE = 256
+MIN_MEMORY_SINGLE = 16
+MAX_DISK_TOTAL = 50
+MAX_DISK_SINGLE = 50
+MIN_DISK_SINGLE = 0.1
+MAX_VMS_TOTAL = 10
+MAX_VMS_ACTIVE = 4
+
+def getMachinesByOwner(user, machine=None):
+ """Return the machines owned by the same as a machine.
+
+ If the machine is None, return the machines owned by the same
+ user.
+ """
+ if machine:
+ owner = machine.owner
+ else:
+ owner = user.username
+ return Machine.select_by(owner=owner)
+
+def maxMemory(user, machine=None, on=True):
+ """Return the maximum memory for a machine or a user.
+
+ If machine is None, return the memory available for a new
+ machine. Else, return the maximum that machine can have.
+
+ on is whether the machine should be turned on. If false, the max
+ memory for the machine to change to, if it is left off, is
+ returned.
+ """
+ if not on:
+ return MAX_MEMORY_SINGLE
+ machines = getMachinesByOwner(user, machine)
+ active_machines = [x for x in machines if g.uptimes[x]]
+ mem_usage = sum([x.memory for x in active_machines if x != machine])
+ return min(MAX_MEMORY_SINGLE, MAX_MEMORY_TOTAL-mem_usage)
+
+def maxDisk(user, machine=None):
+ machines = getMachinesByOwner(user, machine)
+ disk_usage = sum([sum([y.size for y in x.disks])
+ for x in machines if x != machine])
+ return min(MAX_DISK_SINGLE, MAX_DISK_TOTAL-disk_usage/1024.)
+
+def cantAddVm(user):
+ machines = getMachinesByOwner(user)
+ active_machines = [x for x in machines if g.uptimes[x]]
+ if len(machines) >= MAX_VMS_TOTAL:
+ return 'You have too many VMs to create a new one.'
+ if len(active_machines) >= MAX_VMS_ACTIVE:
+ return ('You already have the maximum number of VMs turned on. '
+ 'To create more, turn one off.')
+ return False
+
+def validAddVm(user):
+ reason = cantAddVm(user)
+ if reason:
+ raise InvalidInput('create', True, reason)
+ return True
+
+def haveAccess(user, machine):
+ """Return whether a user has adminstrative access to a machine"""
+ if user.username == 'moo':
+ return True
+ if user.username in (machine.administrator, machine.owner):
+ return True
+ if getafsgroups.checkAfsGroup(user.username, machine.administrator,
+ 'athena.mit.edu'): #XXX Cell?
+ return True
+ if getafsgroups.checkLockerOwner(user.username, machine.owner):
+ return True
+ return owns(user, machine)
+
+def owns(user, machine):
+ """Return whether a user owns a machine"""
+ if user.username == 'moo':
+ return True
+ return getafsgroups.checkLockerOwner(user.username, machine.owner)
+
+def validMachineName(name):
+ """Check that name is valid for a machine name"""
+ if not name:
+ return False
+ charset = string.ascii_letters + string.digits + '-_'
+ if name[0] in '-_' or len(name) > 22:
+ return False
+ for x in name:
+ if x not in charset:
+ return False
+ return True
+
+def validMemory(user, memory, machine=None, on=True):
+ """Parse and validate limits for memory for a given user and machine.
+
+ on is whether the memory must be valid after the machine is
+ switched on.
+ """
+ try:
+ memory = int(memory)
+ if memory < MIN_MEMORY_SINGLE:
+ raise ValueError
+ except ValueError:
+ raise InvalidInput('memory', memory,
+ "Minimum %s MB" % MIN_MEMORY_SINGLE)
+ if memory > maxMemory(user, machine, on):
+ raise InvalidInput('memory', memory,
+ 'Maximum %s MB' % maxMemory(user, machine))
+ return memory
+
+def validDisk(user, disk, machine=None):
+ """Parse and validate limits for disk for a given user and machine."""
+ try:
+ disk = float(disk)
+ if disk > maxDisk(user, machine):
+ raise InvalidInput('disk', disk,
+ "Maximum %s G" % maxDisk(user, machine))
+ disk = int(disk * 1024)
+ if disk < MIN_DISK_SINGLE * 1024:
+ raise ValueError
+ except ValueError:
+ raise InvalidInput('disk', disk,
+ "Minimum %s GB" % MIN_DISK_SINGLE)
+ return disk
+
+def testMachineId(user, machine_id, exists=True):
+ """Parse, validate and check authorization for a given user and machine.
+
+ If exists is False, don't check that it exists.
+ """
+ if machine_id is None:
+ raise InvalidInput('machine_id', machine_id,
+ "Must specify a machine ID.")
+ try:
+ machine_id = int(machine_id)
+ except ValueError:
+ raise InvalidInput('machine_id', machine_id, "Must be an integer.")
+ machine = Machine.get(machine_id)
+ if exists and machine is None:
+ raise InvalidInput('machine_id', machine_id, "Does not exist.")
+ if machine is not None and not haveAccess(user, machine):
+ raise InvalidInput('machine_id', machine_id,
+ "You do not have access to this machine.")
+ return machine
+
+def testAdmin(user, admin, machine):
+ if admin in (None, machine.administrator):
+ return None
+ if admin == user.username:
+ return admin
+ if getafsgroups.checkAfsGroup(user.username, admin, 'athena.mit.edu'):
+ return admin
+ if getafsgroups.checkAfsGroup(user.username, 'system:'+admin,
+ 'athena.mit.edu'):
+ return 'system:'+admin
+ return admin
+
+def testOwner(user, owner, machine):
+ if owner in (None, machine.owner):
+ return None
+ value = getafsgroups.checkLockerOwner(user.username, owner, verbose=True)
+ if not value:
+ return owner
+ raise InvalidInput('owner', owner, value)
+
+def testContact(user, contact, machine=None):
+ if contact in (None, machine.contact):
+ return None
+ if not re.match("^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$", contact, re.I):
+ raise InvalidInput('contact', contact, "Not a valid email.")
+ return contact
+
+def testDisk(user, disksize, machine=None):
+ return disksize
+
+def testName(user, name, machine=None):
+ if name in (None, machine.name):
+ return None
+ if not Machine.select_by(name=name):
+ return name
+ raise InvalidInput('name', name, "Name is already taken.")
+
+def testHostname(user, hostname, machine):
+ for nic in machine.nics:
+ if hostname == nic.hostname:
+ return hostname
+ # check if doesn't already exist
+ if NIC.select_by(hostname=hostname):
+ raise InvalidInput('hostname', hostname,
+ "Already exists")
+ if not re.match("^[A-Z0-9-]{1,22}$", hostname, re.I):
+ raise InvalidInput('hostname', hostname, "Not a valid hostname; "
+ "must only use number, letters, and dashes.")
+ return hostname
projects / invirt/packages/invirt-web.git / commitdiff
